Gyratory muller.



No. 675,265. v Patented May 28, I90l.

A. C. CALKINS.

GYRATURY MULLER.

(N0 Model.) (Application led July 14, 19(10. Renewed Apr. 24,11901.)

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Amm/vers w/NESSES ab vvertical shaft and is rotated with a gyratory UNITED STATES "i ATENT Erice..

ALBERT C. OALKINS, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO FREDERICK W. BRAUN, OF SAME PLACE.

GYRATORY MULLER.

SPECIFICATION forming part of Letters Patent No. 675,265, dated May 28, 1901.

Application tiled July 14, 1900. 'Renewed April 24, 1901. Serial l\To. 57,275. (No modell) To alwwm it may concern:

Be it known that I, ALBERT CHAMPLIN OALKINS, of Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Improvement in Gyratory Mullers, of which the following is a speciication.

My invention is in the nature of an improved pulverizingand grinding device def signed chiefiy for pulverizing ore samples for the use of assayers, but applicable to other uses. It belongs to that class of devices known as gyratory rnullers,l in which a heavy ball having an obliquely-arranged aXis is connected to the horizontal crank-arm of a action in a subjacenturn by the rotation of said shaft and a horizontal crank-arm. My invention is designed to provide a simple, practical, and easily operated device of this kind whichcan be readily opened or disconnected and reconnected to accommodate the conditions of its use by the assayer; and to this end it consists in the peculiar construction and arrangement of parts operating onV the general principle set forth, which I will now proceed to describe with reference to the drawings, in which'- Y Figurel is a side elevation, partly in section; and Fig. 2 is a section on line 2 2.

The device consists of an iron urn or'bowl A, having an opening or discharge-outlet o in the bottom. Rigidly secured over the top of the urn is a heavy bail-shaped frame C. This frame is hinged to one edge of the urn at a and secured at the opposite edge ofthe urn by a thumb-bolt f. This frame is to support in the center vertical line of the urn a shaft E, which has at the top of the hoop an arm D and handle d for rotating the shaft, and the shaft has at its lower end where it emerges through the frame a right-angular crank-arm E. An iron ball B, into which is rigidly secured a piece orshaft b, is fitted to the urn, so that the contour of the ball conforms to the shape of the bottom of the urn. The ball-shaft b is connected to the end of the crank E of the rotating shaft in a manner permitting easy and quick detachability, as follows: Said crank has at its end bifurcated hook-shaped grappling ends e, which clutch pins e/ e on a box e2, which is loosely fitted to the shaft in the ball. Tight engagement between ball and urn is made by means of a coil-spring c around the shaft b in the ball, which coil-spring enters a recess in the neck b of the ball and presses against the ball at its bottom end and against the box e2 on the shaft of the hall at its upperend. The formation of the ball with aneck b extending up and around the shaft and inclosing` the helical spring not only makes a seat for the spring, but makes a protecting Wall or guard for the same, which prevents particlesofl ore from foulingand obstructing the action of said spring.

By turning the handle of the machine the ball rotates and gyrates simultaneously. The crushed ore from an ore-crusher orrookbreaker is fed into the urn, and as the ball is rotated and gyrated the ore is ground to powder and is discharged through the hole o in the bottom of the urn.

The hinge ot and thumb-bolt fof the bailshaped frameare to allow clearing of the machine, which may be done by loosening the thumb-bolt and tipping over the bail, as shown in dotted lines, which movement will disconnect the grappling-hooks c c of the rotating shaft from the box e2 on the ball-shaft.

I do not claim, broadly, a gyrating ball working in an urn by the rotation of a vertical shaft bearing a crank-arm, as I am aware that these general features have been heretofore employed. The distinguishing features of novelty in my invention are the hinged bail-shaped frame, in combination with the open grappling-hooks of the rotating shaft, by which the parts may be quickly opened andiseparated, and the special construction and arrangement ofthe spring-seated ball and its associated parts.

By means of the construction herein shown and described the parts are very readily detached and reattached, allowing rapid cleansing of the machine after finishing one laboratory sample and preparatory 'to grinding another. The only adjustment necessary is to simply release and turn back the bail, the bifurcated and hook-shaped crank-arm separatingfrom the pins of the box bythe act of turning back the bail.

My construction also IOO relies for grinding upon spring tension,\vhich may be adjusted to as great pressure as desired, it being practically impossible in a small machine to get Weight enough in the ball to effect the pulverizing of the ore.

In constructing my machine all the Wearing-faces may be of hardened steel and may be made in detachable sections to permit replacing when Worn.

-In the operation of the device the bali has a peculiar motion. The gyratory actions or revolutions of the upper end of the bail-shaft is in the direction of the revolution of the vertical shaft; but the ball itself in rolling around the urn has by frictional engage ment with its Walls a reverse rotation, which causes the ball-shaft to turn freely in its clntchbox.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In a `gyratory muilcr, the combination with a subjacent urn, and a grinding-ball arranged therein and having a shaft; of a bailshaped frame hinged upon one side and provided With detachable locking devices on the opposite side, a vertical shaft having a central bearing in said. bail-shaped frame and provided with a crank-arm on its lower end havin'g a bifurcated hooked end, and a box having a central bearing for the ball-shaft and opposite pins adapted to be received into the hooked ends of the crank-arm, forming a detachable connection for the ball which is released by the simple turning of the bailshaped frame on its hinge substantially as described.

2. In a gyratory muller, the combination of a grinding-bail having a shaft and a recessed neck formed on the ball and extending up and surrounding the shaft, a sliding box on said shaft having clutch devices for connecting it to its actuating-shaft, and a helical spring surrounding the ball-shaft and seated at one end in the recess of its neck portion and at the other end bearing against the box substantially as and for the purpose described.

3. A gyratory lnuller comprising an urn with a hole in its bottom, a grinding-ball closely fitting the urn and having a recessed neck portion with a shaft in the center of the same, a helical spring surroundingthe shaft, and seated at its lower end in the recess of the balls neck, a sliding box on said shaft having opposite pins, a bail-shaped frame are ranged above the urn and bearing a vertical shaft arranged in a bearing in the frame centrally above the urn, said shaft having at its lower end a crank -arm with a bifurcated hook-shaped clutch embracing the pins of the sliding box substantially as and for the pur pose described.

In testimony whereof I have signed my name to this specification in the presence 0f two subscribing Witnesses.

ALBERT C. CALKINS.

Witnesses:

SIDNEY J. PARSONS, AMY C. LESTER. 

